• PhD in Engineering, University of Yamanashi, Japan (March 2014)
• MPhil in Irrigation Engineering, University of Moratuwa, Sri Lanka (December 2002)
• BSc Eng (Hons) in Civil Engineering, University of Moratuwa, Sri Lanka (February 1999)

• Fellow, The Institution of Engineers Sri Lanka [FIE(SL)]
• Charted Engineer

Academic:

• Senior Lecturer Grade I, Department of Civil and Environmental Engineering, University of Ruhuna (November 2013 to date)
• Senior Lecturer Grade II, Department of Civil and Environmental Engineering, University of Ruhuna (November 2007 to October 2013)
• Lecturer (on contract), Department of Civil and Environmental Engineering, University of Ruhuna (June 2005 – November 2007)
• Postgraduate Student at Department of Civil Engineering, University of Moratuwa (May 2000 – August 2002)
• Visiting Instructor at Department of Civil Engineering, University of Moratuwa (2001/2002)

Industry:

• Hydrologist, Water Resources Secretariat, Sri Lanka (August 2002 – May 2005)
• Engineer, National Water Supply & Drainage Board, Ratmalana (January 2000 – May 2000)
• Junior Engineer, Departments of Buildings, Battaramulla (April 1999 – January 2000)

• Institution of Engineers Sri Lanka (IESL) ANTON Award 1^st place over 35 years of age – for the Best Technical Paper 2013/2014. Competition on “Eco Friendly  Water  Infrastructure for  Sustainable Development and Management Experiences gained from  Integrated  Water Resources Development and Management in  Sri  Lanka”.
• Japan Society for the Promotion of Science (JSPS) Ronpaku Medal Awardee for the PhD study (2013)
• First Runner up of the ‘Water Related Infrastructure Award for the Best Research & Technical Paper – 2001’ organized by the Institution of Engineers Sri Lanka (IESL)
• Award for the Best Presentation ‘Soil & Water Management Session’, 13th Annual Congress of Postgraduate Institute of Agriculture (PGIA), University of Peradeniya, Sri Lanka, November 2001
• Asian Development Bank (ADB) Scholarship to pursue MPhil study at Department of Civil Engineering, University of Moratuwa (2000-2002)
• Japan Society for the Promotion of Science (JSPS) Fellowship to pursue PhD study at University of Yamanashi, Japan (2010-2014)
• Best Paper Award ACEPS 2018 for the co-authored paper titled ‘GIS based groundwater potential Zone Delineation: A Case Study at Upper Gin River Basin, Sri Lanka’, International Symposium on Advances in Civil and Environmental Engineering Practices for Sustainable Development (ACEPS-2018), 15^th March 2018, Galle, Sri Lanka.

• Fellow, The Institution of Engineers Sri Lanka (IESL)
• Member, Japan Society of Civil Engineers [JSCE]
• Provisional Associate Member – Australian Computer Society (ACS)

• Irrigation Water Management
• Hydrologic Modelling & Geoinformatics Applications
• Water Quality Modelling
• Climate Change
• Land Use Dynamics

• Engineering Hydrology (Undergraduate Programme – Semester 6)
• Irrigation Engineering (Undergraduate Programme – Semester 7)
• Irrigation and Watershed Management (Undergraduate Programme – Semester 8)
• Advanced Surveying (Undergraduate Programme – Semester 7)
• Building Engineering (Undergraduate Programme – Semester 6)
• Geographic Information System (GIS) and Remote Sensing (Semester 6)
• Design of Steel and Timber Structures (Undergraduate Programme – Semester 5)
• Engineering Surveying (Undergraduate Programme – Semester 3)
• Fundamentals of Fluid Mechanics (Undergraduate Programme – Semester 2)
• Introduction to Infrastructure Planning (Undergraduate Programme – Semester 1)
• Fundamentals of Civil Engineering (Undergraduate Programme – Semester 1)
• Hydrologic Design and Integrated Catchment Management (Postgraduate Programme – Semester 1)
• Watershed Management and Hydrological Assessments (Postgraduate Programme – Semester 1)
• Hydrological Design in Infrastructure Projects (Postgraduate Programme – Semester 1)
• Hydrologic and Hydrodynamic Modelling  (Postgraduate Programme – Semester 2)
• Postgraduate Research Project (Postgraduate Programme – Semesters 2, 3, and 4)

At University of Ruhuna

• In-Charge, Hydraulics and Coastal Engineering Laboratory, Department of Civil and Environmental Engineering, Faculty of Engineering (2018 to date).
• Postgraduate Programme Coordinator, Department of Civil and Environmental Engineering (2021 to date)
• Chairperson of the Organizing Committee, 14^th Academic Sessions and 13^th Vice Chancellor`s Awards Ceremony, 01^st March 2017, University of Ruhuna.
• Chairperson, Ruhuna Engineering Faculty Scholarship Foundation, Faculty of Engineering (2014 to date).
• Chairperson, Engineering Faculty Students Grievances Committee (2020 to date).
• Member of the Editorial Board- Quality Assurance Sessions, University of Ruhuna, 2022, 2023.
• Faculty Representative for Scholarship Committee, University of Ruhuna (2008 to date)
• Faculty representative to the Students Grievances Committee, University of Ruhuna (2020 to date).
• Advisor, Civil and Environmental Engineering Society (CEES) (2013 to 2016)
• Academic Advisor, Faculty of Engineering (November 2007 to date)
• Secretary, Ruhuna Engineering Faculty Teachers Association (REFTA) (2012, 2013, and 2014)
• Faculty Coordinator, Indigenous Knowledge Centre (April 2012 to date)
• Senior Treasurer, Civil and Environmental Engineering Society (CEES) (2012)
• Academic Warden, Female Hostel, Faculty of Engineering (June 2009 to October 2013)
• Student Counselor, Faculty of Engineering (November 2007 to June 2009 and November 2017 to March 2021 )
• Member of the Faculty Quality Assurance Cell (FQAC) of the Faculty of Graduate Studies, University of Ruhuna (May 2021 to date)
• Member of the Internal Quality Assurance (IQA) Cell of the Department of Civil and Environmental Engineering (2015 to date).
• Member of the Committee for Revision of By-Law, Rules & Regulations and Curriculum, Department of Civil and Environmental Engineering (2022 to date).
• Member of the Self Evaluation Report (SER) writing team for the Programme Review of BSc. Engineering Degree, Faculty of Engineering, University of Ruhuna (2020).
• Member of the Institutional Review Chapter Committee, University of Ruhuna (2020 to date).
• Member of the Buildings and Lands Committee, Faculty of Engineering, University of Ruhuna (2019 to date).
• Member of the Advisory Committee for organizing the ‘Thambarawila 2014’, a cultural event organized by the student union of the Faculty of Engineering, University of Ruhuna (2014).
• Member of Technical Evaluation Committees – Faculty of Engineering and Faculty of Medicine (2009 to date)
• Committee member, Upgrading the playground at University of Ruhuna, Wellamadama, Matara and Construction of a pavilion (2014/2015)
• Chairperson, Committee for preparation of a New Female Hostel Building, Faculty of Engineering, University of Ruhuna (2013)
• Member of the Disciplinary Inquiry Panels, Faculty of Engineering (2009 to date)
• Member of the Hostel and Canteen Management Committee  (June 2009 to October 2013)
• Member of the university level committee to carry out duties related to Activity 4: Promoting Ethnic Cohesion among students and staff under HETC project, University Development Grants (UDGs) (2010).
• Chairperson, Food and Accommodation Sub-Committee, 10^th Anniversary Celebration of the Faculty of Engineering (2010)
• Coordinator/ Member of the Organizing Committee of several Symposia, International and Local Conferences hosted by Faculty of Engineering (2009 to date)
• Technical Session Chair, Technical Session Evaluator of Annual Academic Sessions and several International and Local Conferences hosted by University of Ruhuna.
• Resource Person of several Workshops/Short Courses/Training Programmes conducted by Faculty of Engineering (2010 to date)
• Examination Paper Moderator and External Research Supervisor, Faculty of Fisheries and Marine Sciences & Technology, University of Ruhuna (2018 to date).

National and International 

• Chief Secretary of the Organizing Committee, 7^th International Workshop on River Basin Environment and Management (7^th SURF Workshop), 20-22 September 2019, Unawatuna, Sri Lanka.
• Member of the Editorial Advisory Committee of the APN Science Bulletin, Asia-Pacific Network for Global Change Research. ISSN 2175-761X.
• Member of the Editorial Board of GCE (A/L) Engineering Technology supplementary text books, Educational Publications Department, Sri Lanka
• Member of the Editorial Board of ‘Engineer’, the Journal of the Institution of Engineers (IESL), Sri Lanka
• Expert Reviewer, Hydrological Annual, Department of Irrigation, Sri Lanka (2018 to date).
• Evaluator of Creative Book – Academic Research, National Library and Documentation Services Board, Sri Lanka (2018 to date).
• External reviewer (Grant Proposal Assessor), Asia-Pacific Network for Global Change Research (APN) scientific capacity development proposals (CAPaBLE Programme) (2009 to date).
• Member of the Panel of Judges, Engineering Excellence Awards (2018), Institution of Engineer, Sri Lanka (IESL).
• Evaluation Panel Member appointed by the IESL for the recognition for Bachelor of Science of Engineering Honours in Civil Engineering Degrees.
• Reviewer of several Refereed/ Indexed Journals (2009 to date)
• Reviewer of several International and Local Conferences/Symposia (2009 to date)
• Secretary, Institution of Engineers Sri Lanka (IESL) Southern Chapter, Sessions 2014/2015, 2015/2016, and 2016/2017.
• Chairperson, Examination committees (PhD/MPhil/MSc Degree), University of Moratuwa (2011 to date)
• University of Moratuwa Senate Research Committee appointed Referee to review Proposals for Long Term Grants (2018 to date).
• Hydrologist / Hydro-Environmental Engineer in EIA (Environmental Impact Assessment) and IEE (Initial Environmental Examination) studies at national level (2012 to date).
• Chief Marking Examiner of GCE (A/L) Examination in Technology Stream (Engineering Technology) appointed by Department of Examination, Sri Lanka (2018 to date).
• Resource Person / Course Coordinator of Continuing Professional Development (CPD) activities conducted by the Institution of Engineers Sri Lanka (IESL) Southern Chapter (2015 to date)
• Coordinator and organizer of seminars on ‘Engineering Technology’ subject to help Grade 13 students in Advanced Level Technology stream through the Institution of Engineers (IESL) Southern Chapter (2016).
• Member of Exemption Validation Committee – B.Ed. (Bachelor of Engineering Technology Education), National Institute of Education, Sri Lanka.
• Member of the Curriculum Development Committee for four years B.Ed. (Bachelor of Engineering Technology Education) degree in Engineering Technology at National College of Education in Technology (NCoET) (2019 to date).
• Resource Person of GCE (A/L) Technology Stream Syllabus Modernization Workshops (Engineering Technology Grade 12 and Grade 13) conducted by National Institute of Education, Sri Lanka.
• Resource person for development of Curriculum Materials for B.Ed. (Hons) Degree in Technology for the newly establishing National College of Education in Technology – Kuliyapitiya under the KOICA project (2020).
• Resource person for preparation of GCE (A/L) Engineering Technology paper structure and model questions for the examinations to be held from 2019 onwards, Department of Examinations, Sri Lanka (2018).
• Member of the Curriculum Committee, Teacher’s Guide Grade 12 – GCE (A/L) Engineering Technology,  National Institute of Education, Sri Lanka (2nd Edition: 2017, Publisher: National Institute of Education, Sri Lanka).
• Member of the Curriculum Committee, GCE (A/L) Engineering Technology Grade 13 Teachers’ Guide, National Institute of Education (NIE), Sri Lanka (2017).
• Member of the Curriculum Committee, GCE (A/L) Engineering Technology Grade 12 Practical Guide, National Institute of Education (NIE), Sri Lanka (2017).
• Member of the Curriculum Committee, GCE (A/L) Engineering Technology Grade 13 Practical Guide, National Institute of Education (NIE), Sri Lanka (2018).
• Resource Person of B.Ed. (Bachelor of Engineering Technology Education) Curriculum Revision Workshops conducted by National Institute of Education, Sri Lanka.
• Resource Person, Workshops for preparation of GCE (A/L) Engineering Technology Grade 13 Practical Guide conducted by the National Institute of Education (NIE), Sri Lanka (2018).
• Resource Person, Workshops for preparation of GCE (A/L) Engineering Technology Grade 12 Practical Guide conducted by the National Institute of Education (NIE), Sri Lanka (2017).
• Resource Person, Workshops for preparation of GCE (A/L) Engineering Technology Grade 13 Teachers’ Guide conducted by the National Institute of Education (NIE), Sri Lanka (2017).
• Resource Person, Workshops for preparation of GCE (A/L) Engineering Technology Grade 12 Teachers’ Guide conducted by the National Institute of Education (NIE), Sri Lanka (2017).
• Principal Investigator of the research project ‘Development of an information retrieval system for minor irrigation tanks in southern province of Sri Lanka’ (2012). Research collaborator: Southern Provincial Department of Irrigation, Sri Lanka.
• Member of the Organizing Committee ‘Special Session on Hydraulic Structures’ at 6^th International Conference on Structural Engineering and Construction Management (ICSECM), Kandy, Sri Lanka (2015).
• Member of the organizing committee ‘Pre-conference workshop on ‘International River Interface Cooperative – Water Systems Modelling, Faculty of Engineering, University of Peradeniya, Sri Lanka (2014).
• Examination Paper Moderator and Second Examiner, Department of Civil Engineering, South Eastern University of Sri Lanka (2020 to date).
• Supervision of the Institution of Engineers Sri Lanka (IESL)’s Professional Review B-Paper Examinations (2015 to date).
• Examiner, Institution of Engineers Sri Lanka (IESL) Part II Engineering Course (204: Hydraulics)
• Project Proposal Evaluator, Institution of Engineers Sri Lanka (IESL) Part III Engineering Course (2015 to date).
• Final Project Report Evaluator, Institution of Engineers Sri Lanka (IESL) Part III Engineering Course (2016 to date).
• Evaluation Panel Member, IESL Junior Inventor of the Year (JIY) Southern Province Competitions (2016 to date).
• Member, Local Organizing Committee of ‘International Conference on Sustainable Water Resources Management in the Changing Environment of the Monsoon Region’, November 2004, Colombo, Sri Lanka.

Training Programmes attended:

• Short Course on Quantifying Hydrologic Risk of Extreme Events in a Changing Climate conducted by Environmental & Water Resources Institute of the American Society of Civil Engineers (ASCE-EWRI), Colombo (2016)
• 10^th AOTS-AIT-EBARA International Training Course on “Planning and Design of Pumping Works” at Asian Institute of Technology (AIT), Thailand (August 2007)
• Training Course on Certificate in IT Application for Planning & Management using Spatial Databases, International Center for Geo-informatics Application and Training (ICGAT), University of Moratuwa, Sri Lanka (December 2003 – February 2004)
• Short Course on Impacts of Climate Change on Water Resources, Open University of Sri Lanka (October 2003)
• International Training Program on Coastal Zone Management using Remote Sensing (RS) & Geographic Information Systems (GIS), GIS application Center, Asian Institute of Technology (AIT), Bangkok, Thailand (June – July 2002)
• Training Course on Programming in Visual Basic 6.0, Institute of Computer Technology, University of Colombo, Sri Lanka (August 2001)
• Completed Australian Computer Society (ACS) Examinations in Information Technology (IT) (July 2001)
• Training Course on Water & Waste Water Engineering Practices for Engineers, National Water Supply & Drainage Board, Manpower & Training Division, Ratmalana (January 2000)

Conferences and Workshops attended:

• 7^th International Workshop on River Basin Environment and Management (7^th SURF Workshop), 20-22 September 2019, Unawatuna, Sri Lanka.
• 6^th International Young Researchers Workshop on River Basin Environment and Management, 19 – 21 October 2018, Bali, Indonesia.
• Stakeholder Consultation Workshop on Provincial Adaptation Plans and Sri Lanka’s Third National Communication on Climate Change for the Southern Province, Galle (2018).
• Workshop on Curriculum Mapping and Aligning Assessments, Faculty of Engineering, University of Ruhuna, Sri Lanka (2017).
• 7^th International Conference on Water Resources and Environment Research (ICWRER) Conference, Kyoto, Japan (2016).
• International Conference on Water Security and Climate Change, Asian Institute of Technology, Bangkok, Thailand (2016).
• Workshop on The Use of SPSS in Social Research, Faculty of Management and Finance, University of Ruhuna, Sri Lanka (2016).
• Workshop on ‘Climate change, water management and agricultural decision making’ organized by American Institute for Lankan Studies, Colombo, Sri Lanka (2015).
• Workshop on International River Interface Cooperative – Water Systems Modelling, Faculty of Engineering, University of Peradeniya, Sri Lanka (2014).

• 2^nd Workshop on Water Resources in Developing Countries: Planning and Management in a Climate Change Scenario, ICTP-Trieste, Italy (2013)
• 2010 Annual Conference, Japan Society of Hydrology and Water Resources, 7 – 9 September 2010, Tokyo, Japan
• Workshop on Qualitative Research Methods, April 2009, Organized by Staff Development Centre (SDC), University of Ruhuna in collaboration with University of Durham and GaRNET
• Regional Workshop on Right to Water and Sanitation in Emergencies”, managed by ACF for the WASH Global Cluster & UNICEF, 23 – 24 February 2009, Thailand
• Workshop on “Counseling the undergraduate; Workshop for Academics”, 10 -11 September 2008 organized by Faculty of Medicine, University of Ruhuna
• Roundtable discussion on Adapting to Climate Change in Sri Lanka, Jointly organized  by ISET and Practical Action, 25th January 2008, Taj Samudra Hotel, Colombo
• International Conference on Hydrology and Watershed Management (ICHWAM), 5 – 8 December 2006 Hyderabad, India
• International Conference on Sustainable Water Resources Management in Changing Environment of the Monsoon Region (WRMinCE), 17 – 19 November 2004, Colombo, Sri Lanka
• 2^nd International Conference on Hydrology and Water Resources in Asia and Pacific Region, 5 – 9 July 2004, Singapore
• 10^th Asian Congress of Fluid Mechanics (ACFMX), 17-21 May 2004, University of Peradeniya, Sri Lanka
• 3^rd World Water Forum (WWF), 16 – 23 March 2003  in Kyoto, Shiga, and Osaka, Japan
• 1^st International Conference on Hydrology and Water Resources in Asia Pacific Region, 13 – 15 March 2003, Kyoto, Japan
• Application of Strategic Planning and Management to Water Resources – Subregional Workshop for South Asia conducted by UNESCAP, 10 – 13 September 2002, Colombo, Sri Lanka
• 18th International Congress on Irrigation & Drainage (ICID), 21 – 28 July 2002, Montreal, Canada
• 13^th Annual Congress of Postgraduate Institute of Agriculture (PGIA), University of Peradeniya, Sri Lanka, November 2001

Book Chapters:

• Wickramaarachchi, T. N. (2021), Flood Discharge Estimation in Baddegama using Pearson Type III and Gumbel Distributions. In Babel, M.S., Haarstrick, A., Ribbe, L., Shinde, V., Dichtl, N., (Eds.), Water Security in Asia, Springer Water, pp 329-337.

• GCE (A/L) Technology stream supplementary text book, Engineering Technology – Part III, Publisher: Educational Publications Department, Sri Lanka (First edition 2015)

Refereed Journal Publications :

• Wickramaarachchi T.N. and S.S.D.S. Gunasekara, (2023), Temporal Transferability of Calibrated Hydrological Model Parameters: A Case Study of Gin Catchment, Sri Lanka, ‘Engineer’, Journal of the Institution of Engineers Sri Lanka, Vol.56(1), pp 11-20.
• Prabaswara, M.H.M.A., and Wickramaarachchi, T.N. (2023), Event-based rainfall-runoff simulation using different precipitation loss methods: case study in tropical monsoon catchment. Sustainable Water Resources Management, Vol. 9(1): 16.
• Jayapadma J.M.M.U., Wickramaarachchi T.N., Silva G.H.A.C., Ishidaira H., and Magome J. (2022), Coupled hydrodynamic modelling approach to assess land use change induced flood characteristics, Environmental Monitoring and Assessment 194: 354.
• Jayapadma J.M.M.U., Kazuyoshi Souma, Hiroshi Ishidaira, Jun Magome, and Wickramaarachchi T.N. (2022), The Effect of Incorporation of Embankment Information for Flood Simulation of the Gin River, Sri Lanka, Journal of Disaster Research, Vol.17 (3), pp. 475-486.
• Wickramaarachchi T.N. and Rathnayake R.M.K., (2021), Performance Evaluation of Single and Multi-objective Calibration in Rainfall-Runoff Modelling, ‘Engineer’, Journal of the Institution of Engineers Sri Lanka, Vol.54(2), pp 77-90.
• Wickramaarachchi T.N., Ranaweera R.C.W., and Kumara R.A.J.P., (2020), Soil Surface Evaporation Control by Plant-based Mulching during the Energy Limiting and Falling Rate Evaporation Stages, ‘Engineer’, Journal of the Institution of Engineers Sri Lanka, Vol.53(4), pp 11-20.
• Wickramaarachchi T.N., (2018), Rating curve based assessment of seasonal variability of sulfate in streamflow, Environmental Monitoring and Assessment 190: 493.
• Wickramaarachchi T.N., Venukanan T., and Diluckshanaraj R., (2018), Comparison of Experimentally and Theoretically Determined Infiltration in Coarse Textured Soil, International Journal of Engineering 31(6): pp 886-893.

• Wickramaarachchi TN, Ishidaira H,  Magome J. (2015). A spatial-statistical approach to evaluate land use change in Galle DSD, Sri Lanka. Research Journal of Applied Sciences, Engineering & Technology 11(10):1041-1047.
• Wickramaarachchi TN, Ishidaira H, Magome J, Wijayaratna TMN. (2015). Projecting Turbidity Levels in Future River Flow: A Mathematical Modeling Approach, ‘Engineer’, Journal of the Institution of Engineers Sri Lanka 48(1): 61-70.
• Wickramaarachchi TN, Ishidaira H, Magome J, Wijayaratna TMN. (2014). Impact of future flow regime alterations on iron load occurrence in Gin River, Sri Lanka, Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)70(4): I_127-132.
• Wickramaarachchi TN, Ishidaira H, Wijayaratna TMN. (2013). Applicability of global public domain data versus local detailed data for distributed hydrologic modelling: A study form Gin River basin Sri Lanka. Applied Water Science 3(2):545-557.
• Wickramaarachchi TN, Ishidaira H, Wijayaratna TMN. (2013). Projecting land use transitions in the Gin Catchment, Sri Lanka. Research Journal of Environmental and Earth Sciences 5(8):473-480.
• Wickramaarachchi TN, Ishidaira H, Wijayaratna TMN. (2013). Variation of constituent loads and concentrations with the flow in Gin River, Sri Lanka. Journal of National Science Foundation, Sri Lanka41(3):237-247.
• Wickramaarachchi TN, Ishidaira H, Wijayaratna TMN. (2013). Streamflow, Suspended Solids, and Turbidity Characteristics of the Gin River, Sri Lanka. ‘Engineer’, Journal of the Institution of Engineers Sri Lanka 46(4):43-51.
• Wickramaarachchi TN, Ishidaira H, Wijayaratna TMN. (2012). An Application of Distributed Hydrological Model, YHyM/BTOPMC to Gin Ganga Watershed, Sri Lanka. ‘Engineer’, Journal of the Institution of Engineers Sri Lanka 45(2):31-40.
• Wijesekera NTS and Wickramaarachchi TN. (2003). Reality of Irrigation water Use and Suggestions for Better Management – A Comparison of Two Schemes from Sri Lanka, Water Science & Technology, Journal of International Water Association (IWA), 48(7): 197-206.
• Wickramaarachchi TN, Wijesekera NTS and Gamage NPD. (2002). Water Scheduling for Better Yield in Paddy Cultivation – A study from Mahaweli system H of Sri Lanka, ‘Engineer’, Journal of the Institution of Engineers Sri Lanka35(2): 38-44.
• Wickramaarachchi TN and Wijesekera NTS. (2001). A Comparison of Irrigation Water Issue Options – Case Study from system H of Mahaweli Development Programme,  Journal of Tropical Agricultural Research 13: 143-155.

Conference Proceedings:

Full papers

• Jayapadma J.M.M.U., Souma K., Ishidaira H., Magome J. and Wickramaarachchi T.N. (2023). Impact of Climate Change on Flood Peak Discharges and Inundated Area in the Gin River Basin, Sri Lanka. Proceedings of the 19^th Annual Conference of the Asia Oceania Geosciences Society (AOGS 2022 Virtual), 01-05 August 2022.
• Jayapadma J.M.M.U., Wickramaarachchi T.N., Silva G.H.A.C., Ishidaira H., Magome J. and Souma K. (2022). Impact of Land Use Change on Flood Peak Discharges and Runoff Volumes at the Catchment Scale. Proceedings of the 18^th Annual Conference of the Asia Oceania Geosciences Society (AOGS 2021), 01-06 August 2021, Singapore.

• Jayapadma J.M.M.U., Wickramaarachchi T.N., Silva G.H.A.C., Ishidaira H., and Magome J. (2018). Rainfall-Runoff Modelling Using MIKE 11 (NAM Model): A Case Study of GIN River Basin. Proceedings of the International Symposium on Advances in Civil and Environmental Engineering Practices for Sustainable Development (ACEPS-2018), 15th March 2018, Faculty of Engineering, University of Ruhuna, Galle, Sri Lanka.
• Edirimanna E.R.D.L., Silva G.H.A.C., Wickramaarachchi T.N., Ishidaira H. and Magome J. (2018). GIS Based Groundwater Potential Zone Delineation: A Case Study at Upper Gin River Basin, Sri Lanka. Proceedings of the International Symposium on Advances in Civil and Environmental Engineering Practices for Sustainable Development (ACEPS-2018), 15th March 2018, Faculty of Engineering, University of Ruhuna, Galle, Sri Lanka.
• Wickramaarachchi T.N. (2016) Frequency Analysis of Flood Discharge in Gin River at Tawalama, Sri Lanka, Proceedings of 7th ICWRER Conference, 5-9 June 2016, Kyoto, Japan
• Wickramaarachchi T.N., Ishidaira H. and Wijayaratna T.M.N. (2013) An Assessment of Constituent Loads in Gin River at Baddegama, Sri Lanka, Proceedings of India Water Week-2013, 8 -12 April 2013,  New Delhi, India.
• Wickramaarachchi T.N., Sharmila K., Lakmali A.A.C., Vipulaguna P.M.M. and Kumara K.H.N.S. (2011) An experience in estimating evapotranspiration using Lysimeter in Hapugala, Sri Lanka, Proceedings of 35^th WEDC International Conference 5-8 July 2011, Loughborough  University, UK
• Wickramaarachchi T.N., (2006), An Assessment of Surface Water Resources – A Study from Menik Ganga Basin of Sri Lanka, Proceedings of the International Conference on Hydrology and Watershed Management (ICHWAM), 5^th – 8^th December 2006, Hyderabad, India
• Wickramaarachchi T.N., (2004), Preliminary  Assessment of Surface Water Resources – A Study from Deduru Oya Basin of Sri Lanka, Proceedings of the 2^nd International Conference on Hydrology and Water Resources in Asia and Pacific Region (APHW 2004), 5^th – 9^th July 2004, Singapore
• Wickramaarachchi T.N. and Wijesekera N.T.S., (2003), Present Irrigation water Management Issues and Suggestions for Productive Water Use – A Comparison of Three Irrigation Schemes from Sri Lanka, Proceedings of the 1^st International Conference on Hydrology and Water Resources in Asia and Pacific Region, Kyoto, Japan, 13 – 15 March 2003 (APHW 2003), Vol 1
• Wickramaarachchi T.N., Wijesekera N.T.S. and Gamage N.P.D. (2002) Water Scheduling for Better Paddy Yield – A study from  Sri Lanka, Transactions/ Actes, Volume 1A of 18^th Congress on Irrigation & Drainage, 18^th International Congress on Irrigation & Drainage, 21 – 28 July 2002, Montreal, Canada.
• Wickramaarachchi T.N. and Wijesekera N.T.S., (2002), Techniques and Challenges in Implementing the Irrigation Water Management for Productive Use in Paddy Cultivation – Sri Lanka, Young Professionals Forum (YPF) at 18^th International Congress on Irrigation & Drainage, Montreal, Canada, 21 – 28 July 2002

Abstracts

• Jayapadma J.M.M.U., Wickramaarachchi T.N., Silva G.H.A.C., Ishidaira H., and Magome J. (2019). River Flood Simulation using MIKE FLOOD – A Case Study of Gin River, Sri Lanka. Proceedings of the 7^th SURF Workshop on River Basin Environment and Management, 20-22 September 2019, Unawatuna, Sri Lanka.
• Yashmika B., Gamage T.P.D., Atapaththu K.S.S. and Wickramaarachchi T.N. (2019). Impact Assessment of climate change and land use change on flood behavior of Nilwala River, Matara, Sri Lanka. Proceedings of the 25th Scientific Sessions of the Sri Lanka Association for Fisheries and Aquatic Resources (SLAFAR), 19th August 2019, University of Ruhuna, Sri Lanka.
• Wickramaarachchi TN. (2014). Climatic Impacts on Future Water Quality in Southern Sri Lanka. Indian Ocean Futures Conference 2014, 25-28^th March 2014
• Jayatillake KDLI, Rathnayaka MS, Wannipura CJ, Wickramaarachchi TN, Kariyawasam C. (2014). Evaluation of conveyance and other losses in a medium irrigation tank. First Annual Research Symposium (ARS-2013), Faculty of Engineering, University of Ruhuna, 18^th January 2014.
• Wickramaarachchi TN. (2013). Investigating major hydrological characteristics of Gin catchment, Sri Lanka using distributed hydrologic simulation approach. Knowledge for the Future, IAHS – IAPSO – IASPEI Joint Assembly, 22-26^th July 2013, Gothenburg, Sweden.

Poster

• Wickramaarachchi TN. (2012). Investigating major hydrological characteristics of Gin Ganga watershed, Sri Lanka using distributed hydrologic simulation approach. Workshop on Hands on Research in Complex Systems, Shanghai Jiao Tong University,  17 – 29^th June 2012, Shanghai, China.

Reports:

• “Literature Review and Information Survey on Climate Change Issues in Sri Lanka – Increasing the resilience of Poor Communities to cope with the Impact of Climate Change” submitted to ITDG- South Asia, January 2005
• “Available Material and Information on Climate Change Issues in Sri Lanka”, submitted to ITDG- South Asia, March 2008

Thesis:

• Wickramaarachchi T.N. (2014) Hydrologic Modeling of the Gin River Basin Sri Lanka in Assessing the Environmental Effects due to Catchment Change, PhD Dissertation, University of Yamanashi, Japan, March 2014
• Wickramaarachchi T.N. (2002) A Study of Irrigation Water Use for Paddy Cultivation in the Dry Zone of Sri Lanka, MPhil Dissertation, University of Moratuwa, Sri Lanka, October 2002